<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Title</title>
    <link href="css/common.css" rel="stylesheet">
</head>
<body>
<div id="header">
    <div class="menu"><I></I> Package</div>
    <div class="menu"><I></I>User</div>
    <div class="menu"><I></I>Department</div>
    <div class="menu"><I></I>Setting</div>

</div>
<div id="nav">
    <button class="button success">good</button>
</div>
<div id="main">
    <iframe src="" id="desktop"></iframe>
</div>
</body>
</html>